While he admits he doesn't often reach for Swift's self-titled or Fearless albums when he's in the mood for country, he wishes the country cutie continued success.

"She knows how to play guitar and she writes her songs so God bless her. I wish there was more of that out there," he told PEOPLE Sunday while celebrating his 39th birthday at Palazzo Las Vegas's Lavo. "Hopefully she gets better and grows and keeps it all going."

What Rock is listening to nowadays: country artists Zac Brown and Jamey Johnson. "They both write their songs and they are those people in their songs, so I champion both those guys," Rock said. – Mark Gray